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1da177e4 LT |
1 | #include <linux/kernel.h> |
2 | #include <media/saa7146_vv.h> | |
3 | ||
4 | static void calculate_output_format_register(struct saa7146_dev* saa, u32 palette, u32* clip_format) | |
5 | { | |
6 | /* clear out the necessary bits */ | |
7 | *clip_format &= 0x0000ffff; | |
8 | /* set these bits new */ | |
9 | *clip_format |= (( ((palette&0xf00)>>8) << 30) | ((palette&0x00f) << 24) | (((palette&0x0f0)>>4) << 16)); | |
10 | } | |
11 | ||
12 | static void calculate_hps_source_and_sync(struct saa7146_dev *dev, int source, int sync, u32* hps_ctrl) | |
13 | { | |
14 | *hps_ctrl &= ~(MASK_30 | MASK_31 | MASK_28); | |
15 | *hps_ctrl |= (source << 30) | (sync << 28); | |
16 | } | |
17 | ||
18 | static void calculate_hxo_and_hyo(struct saa7146_vv *vv, u32* hps_h_scale, u32* hps_ctrl) | |
19 | { | |
20 | int hyo = 0, hxo = 0; | |
21 | ||
22 | hyo = vv->standard->v_offset; | |
23 | hxo = vv->standard->h_offset; | |
24 | ||
25 | *hps_h_scale &= ~(MASK_B0 | 0xf00); | |
26 | *hps_h_scale |= (hxo << 0); | |
27 | ||
28 | *hps_ctrl &= ~(MASK_W0 | MASK_B2); | |
29 | *hps_ctrl |= (hyo << 12); | |
30 | } | |
31 | ||
32 | /* helper functions for the calculation of the horizontal- and vertical | |
33 | scaling registers, clip-format-register etc ... | |
34 | these functions take pointers to the (most-likely read-out | |
35 | original-values) and manipulate them according to the requested | |
36 | changes. | |
37 | */ | |
38 | ||
39 | /* hps_coeff used for CXY and CXUV; scale 1/1 -> scale 1/64 */ | |
40 | static struct { | |
41 | u16 hps_coeff; | |
42 | u16 weight_sum; | |
43 | } hps_h_coeff_tab [] = { | |
44 | {0x00, 2}, {0x02, 4}, {0x00, 4}, {0x06, 8}, {0x02, 8}, | |
45 | {0x08, 8}, {0x00, 8}, {0x1E, 16}, {0x0E, 8}, {0x26, 8}, | |
46 | {0x06, 8}, {0x42, 8}, {0x02, 8}, {0x80, 8}, {0x00, 8}, | |
47 | {0xFE, 16}, {0xFE, 8}, {0x7E, 8}, {0x7E, 8}, {0x3E, 8}, | |
48 | {0x3E, 8}, {0x1E, 8}, {0x1E, 8}, {0x0E, 8}, {0x0E, 8}, | |
49 | {0x06, 8}, {0x06, 8}, {0x02, 8}, {0x02, 8}, {0x00, 8}, | |
50 | {0x00, 8}, {0xFE, 16}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, | |
51 | {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, | |
52 | {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, | |
53 | {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0x7E, 8}, | |
54 | {0x7E, 8}, {0x3E, 8}, {0x3E, 8}, {0x1E, 8}, {0x1E, 8}, | |
55 | {0x0E, 8}, {0x0E, 8}, {0x06, 8}, {0x06, 8}, {0x02, 8}, | |
56 | {0x02, 8}, {0x00, 8}, {0x00, 8}, {0xFE, 16} | |
57 | }; | |
58 | ||
59 | /* table of attenuation values for horizontal scaling */ | |
60 | static u8 h_attenuation[] = { 1, 2, 4, 8, 2, 4, 8, 16, 0}; | |
61 | ||
62 | /* calculate horizontal scale registers */ | |
63 | static int calculate_h_scale_registers(struct saa7146_dev *dev, | |
64 | int in_x, int out_x, int flip_lr, | |
65 | u32* hps_ctrl, u32* hps_v_gain, u32* hps_h_prescale, u32* hps_h_scale) | |
66 | { | |
67 | /* horizontal prescaler */ | |
68 | u32 dcgx = 0, xpsc = 0, xacm = 0, cxy = 0, cxuv = 0; | |
69 | /* horizontal scaler */ | |
70 | u32 xim = 0, xp = 0, xsci =0; | |
71 | /* vertical scale & gain */ | |
72 | u32 pfuv = 0; | |
73 | ||
74 | /* helper variables */ | |
75 | u32 h_atten = 0, i = 0; | |
76 | ||
77 | if ( 0 == out_x ) { | |
78 | return -EINVAL; | |
79 | } | |
80 | ||
81 | /* mask out vanity-bit */ | |
82 | *hps_ctrl &= ~MASK_29; | |
83 | ||
84 | /* calculate prescale-(xspc)-value: [n .. 1/2) : 1 | |
85 | [1/2 .. 1/3) : 2 | |
86 | [1/3 .. 1/4) : 3 | |
87 | ... */ | |
88 | if (in_x > out_x) { | |
89 | xpsc = in_x / out_x; | |
90 | } | |
91 | else { | |
92 | /* zooming */ | |
93 | xpsc = 1; | |
94 | } | |
95 | ||
96 | /* if flip_lr-bit is set, number of pixels after | |
97 | horizontal prescaling must be < 384 */ | |
98 | if ( 0 != flip_lr ) { | |
99 | ||
100 | /* set vanity bit */ | |
101 | *hps_ctrl |= MASK_29; | |
102 | ||
103 | while (in_x / xpsc >= 384 ) | |
104 | xpsc++; | |
105 | } | |
106 | /* if zooming is wanted, number of pixels after | |
107 | horizontal prescaling must be < 768 */ | |
108 | else { | |
109 | while ( in_x / xpsc >= 768 ) | |
110 | xpsc++; | |
111 | } | |
112 | ||
113 | /* maximum prescale is 64 (p.69) */ | |
114 | if ( xpsc > 64 ) | |
115 | xpsc = 64; | |
116 | ||
117 | /* keep xacm clear*/ | |
118 | xacm = 0; | |
119 | ||
120 | /* set horizontal filter parameters (CXY = CXUV) */ | |
121 | cxy = hps_h_coeff_tab[( (xpsc - 1) < 63 ? (xpsc - 1) : 63 )].hps_coeff; | |
122 | cxuv = cxy; | |
123 | ||
124 | /* calculate and set horizontal fine scale (xsci) */ | |
125 | ||
126 | /* bypass the horizontal scaler ? */ | |
127 | if ( (in_x == out_x) && ( 1 == xpsc ) ) | |
128 | xsci = 0x400; | |
129 | else | |
130 | xsci = ( (1024 * in_x) / (out_x * xpsc) ) + xpsc; | |
131 | ||
132 | /* set start phase for horizontal fine scale (xp) to 0 */ | |
133 | xp = 0; | |
134 | ||
135 | /* set xim, if we bypass the horizontal scaler */ | |
136 | if ( 0x400 == xsci ) | |
137 | xim = 1; | |
138 | else | |
139 | xim = 0; | |
140 | ||
141 | /* if the prescaler is bypassed, enable horizontal | |
142 | accumulation mode (xacm) and clear dcgx */ | |
143 | if( 1 == xpsc ) { | |
144 | xacm = 1; | |
145 | dcgx = 0; | |
146 | } else { | |
147 | xacm = 0; | |
148 | /* get best match in the table of attenuations | |
149 | for horizontal scaling */ | |
150 | h_atten = hps_h_coeff_tab[( (xpsc - 1) < 63 ? (xpsc - 1) : 63 )].weight_sum; | |
151 | ||
152 | for (i = 0; h_attenuation[i] != 0; i++) { | |
153 | if (h_attenuation[i] >= h_atten) | |
154 | break; | |
155 | } | |
156 | ||
157 | dcgx = i; | |
158 | } | |
159 | ||
160 | /* the horizontal scaling increment controls the UV filter | |
161 | to reduce the bandwith to improve the display quality, | |
162 | so set it ... */ | |
163 | if ( xsci == 0x400) | |
164 | pfuv = 0x00; | |
165 | else if ( xsci < 0x600) | |
166 | pfuv = 0x01; | |
167 | else if ( xsci < 0x680) | |
168 | pfuv = 0x11; | |
169 | else if ( xsci < 0x700) | |
170 | pfuv = 0x22; | |
171 | else | |
172 | pfuv = 0x33; | |
173 | ||
174 | ||
175 | *hps_v_gain &= MASK_W0|MASK_B2; | |
176 | *hps_v_gain |= (pfuv << 24); | |
177 | ||
178 | *hps_h_scale &= ~(MASK_W1 | 0xf000); | |
179 | *hps_h_scale |= (xim << 31) | (xp << 24) | (xsci << 12); | |
180 | ||
181 | *hps_h_prescale |= (dcgx << 27) | ((xpsc-1) << 18) | (xacm << 17) | (cxy << 8) | (cxuv << 0); | |
182 | ||
183 | return 0; | |
184 | } | |
185 | ||
186 | static struct { | |
187 | u16 hps_coeff; | |
188 | u16 weight_sum; | |
189 | } hps_v_coeff_tab [] = { | |
190 | {0x0100, 2}, {0x0102, 4}, {0x0300, 4}, {0x0106, 8}, {0x0502, 8}, | |
191 | {0x0708, 8}, {0x0F00, 8}, {0x011E, 16}, {0x110E, 16}, {0x1926, 16}, | |
192 | {0x3906, 16}, {0x3D42, 16}, {0x7D02, 16}, {0x7F80, 16}, {0xFF00, 16}, | |
193 | {0x01FE, 32}, {0x01FE, 32}, {0x817E, 32}, {0x817E, 32}, {0xC13E, 32}, | |
194 | {0xC13E, 32}, {0xE11E, 32}, {0xE11E, 32}, {0xF10E, 32}, {0xF10E, 32}, | |
195 | {0xF906, 32}, {0xF906, 32}, {0xFD02, 32}, {0xFD02, 32}, {0xFF00, 32}, | |
196 | {0xFF00, 32}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, | |
197 | {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, | |
198 | {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, | |
199 | {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x817E, 64}, | |
200 | {0x817E, 64}, {0xC13E, 64}, {0xC13E, 64}, {0xE11E, 64}, {0xE11E, 64}, | |
201 | {0xF10E, 64}, {0xF10E, 64}, {0xF906, 64}, {0xF906, 64}, {0xFD02, 64}, | |
202 | {0xFD02, 64}, {0xFF00, 64}, {0xFF00, 64}, {0x01FE, 128} | |
203 | }; | |
204 | ||
205 | /* table of attenuation values for vertical scaling */ | |
206 | static u16 v_attenuation[] = { 2, 4, 8, 16, 32, 64, 128, 256, 0}; | |
207 | ||
208 | /* calculate vertical scale registers */ | |
209 | static int calculate_v_scale_registers(struct saa7146_dev *dev, enum v4l2_field field, | |
210 | int in_y, int out_y, u32* hps_v_scale, u32* hps_v_gain) | |
211 | { | |
212 | int lpi = 0; | |
213 | ||
214 | /* vertical scaling */ | |
215 | u32 yacm = 0, ysci = 0, yacl = 0, ypo = 0, ype = 0; | |
216 | /* vertical scale & gain */ | |
217 | u32 dcgy = 0, cya_cyb = 0; | |
218 | ||
219 | /* helper variables */ | |
220 | u32 v_atten = 0, i = 0; | |
221 | ||
222 | /* error, if vertical zooming */ | |
223 | if ( in_y < out_y ) { | |
224 | return -EINVAL; | |
225 | } | |
226 | ||
227 | /* linear phase interpolation may be used | |
228 | if scaling is between 1 and 1/2 (both fields used) | |
229 | or scaling is between 1/2 and 1/4 (if only one field is used) */ | |
230 | ||
231 | if (V4L2_FIELD_HAS_BOTH(field)) { | |
232 | if( 2*out_y >= in_y) { | |
233 | lpi = 1; | |
234 | } | |
235 | } else if (field == V4L2_FIELD_TOP | |
236 | || field == V4L2_FIELD_ALTERNATE | |
237 | || field == V4L2_FIELD_BOTTOM) { | |
238 | if( 4*out_y >= in_y ) { | |
239 | lpi = 1; | |
240 | } | |
241 | out_y *= 2; | |
242 | } | |
243 | if( 0 != lpi ) { | |
244 | ||
245 | yacm = 0; | |
246 | yacl = 0; | |
247 | cya_cyb = 0x00ff; | |
248 | ||
249 | /* calculate scaling increment */ | |
250 | if ( in_y > out_y ) | |
251 | ysci = ((1024 * in_y) / (out_y + 1)) - 1024; | |
252 | else | |
253 | ysci = 0; | |
254 | ||
255 | dcgy = 0; | |
256 | ||
257 | /* calculate ype and ypo */ | |
258 | ype = ysci / 16; | |
259 | ypo = ype + (ysci / 64); | |
260 | ||
261 | } else { | |
262 | yacm = 1; | |
263 | ||
264 | /* calculate scaling increment */ | |
265 | ysci = (((10 * 1024 * (in_y - out_y - 1)) / in_y) + 9) / 10; | |
266 | ||
267 | /* calculate ype and ypo */ | |
268 | ypo = ype = ((ysci + 15) / 16); | |
269 | ||
270 | /* the sequence length interval (yacl) has to be set according | |
271 | to the prescale value, e.g. [n .. 1/2) : 0 | |
272 | [1/2 .. 1/3) : 1 | |
273 | [1/3 .. 1/4) : 2 | |
274 | ... */ | |
275 | if ( ysci < 512) { | |
276 | yacl = 0; | |
277 | } else { | |
278 | yacl = ( ysci / (1024 - ysci) ); | |
279 | } | |
280 | ||
281 | /* get filter coefficients for cya, cyb from table hps_v_coeff_tab */ | |
282 | cya_cyb = hps_v_coeff_tab[ (yacl < 63 ? yacl : 63 ) ].hps_coeff; | |
283 | ||
284 | /* get best match in the table of attenuations for vertical scaling */ | |
285 | v_atten = hps_v_coeff_tab[ (yacl < 63 ? yacl : 63 ) ].weight_sum; | |
286 | ||
287 | for (i = 0; v_attenuation[i] != 0; i++) { | |
288 | if (v_attenuation[i] >= v_atten) | |
289 | break; | |
290 | } | |
291 | ||
292 | dcgy = i; | |
293 | } | |
294 | ||
295 | /* ypo and ype swapped in spec ? */ | |
296 | *hps_v_scale |= (yacm << 31) | (ysci << 21) | (yacl << 15) | (ypo << 8 ) | (ype << 1); | |
297 | ||
298 | *hps_v_gain &= ~(MASK_W0|MASK_B2); | |
299 | *hps_v_gain |= (dcgy << 16) | (cya_cyb << 0); | |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
304 | /* simple bubble-sort algorithm with duplicate elimination */ | |
305 | static int sort_and_eliminate(u32* values, int* count) | |
306 | { | |
307 | int low = 0, high = 0, top = 0, temp = 0; | |
308 | int cur = 0, next = 0; | |
309 | ||
310 | /* sanity checks */ | |
311 | if( (0 > *count) || (NULL == values) ) { | |
312 | return -EINVAL; | |
313 | } | |
314 | ||
315 |